Keyboard Hook

[danten]

Hello
I have a problem with the application.
I created a Keyboard Hook and wants to work on another computer than just for me.
Can you please help.

Delphi-Quellcode:

type
  TMainForm = class(TForm)
    lbl: TLabel;
    procedure FormCreate(Sender: TObject);
    procedure FormDestroy(Sender: TObject);
  end;

var
  MainForm: TMainForm;
  MainHook : HHOOK;
  Wnd1,Wnd2 : array[0..255] of char;

implementation

{$R *.dfm}

function GetCapsLockStatus: Integer;
begin
   Result := GetKeyState(VK_CAPITAL);
end;

function KeyboardHook(Code: Integer; wParam : WPARAM;
  lParam : LPARAM): Longint; stdcall;
var
  Buffer : TEventMsg;

  procedure TranslateKey(Key : Byte);
  begin
    if (Key <> VK_LBUTTON) and (Key <> VK_RBUTTON) then
    begin
      GetWindowText(GetForegroundWindow, Wnd2, SizeOf(Wnd2));
      if wnd1 <> wnd2 then
    begin
      Wnd1 := Wnd2;
    end;
    end;
    with MainForm do
    begin
      case Key of
        VK_RETURN      :    lbl.Caption := ('[Enter]');
        VK_BACK        :    lbl.Caption := ('[Backspace]');
        VK_ESCAPE      :    lbl.Caption := ('[Esc]');
        VK_SHIFT       :    lbl.Caption := ('[Shift]');
        VK_MENU        :    lbl.Caption := ('[Alt]');
        VK_CONTROL     :    lbl.Caption := ('[Ctrl]');
        VK_DELETE      :    lbl.Caption := ('[Delete]');
        VK_SPACE       :    lbl.Caption := ('[SPACE]');
        VK_NUMLOCK     :    lbl.Caption := ('[NumLock]');
        VK_SEPARATOR   :    lbl.Caption := ('[Separator]');
        VK_SUBTRACT    :    lbl.Caption := ('[Subtract]');
        VK_DECIMAL     :    lbl.Caption := ('[Decimal]');
        VK_DIVIDE      :    lbl.Caption := ('[Divide]');
        VK_SCROLL      :    lbl.Caption := ('[Scroll]');
        VK_LSHIFT      :    lbl.Caption := ('[Left Shift]');
        VK_RSHIFT      :    lbl.Caption := ('[Right Shift]');
        VK_LCONTROL    :    lbl.Caption := ('[Left Control]');
        VK_RCONTROL    :    lbl.Caption := ('[Right Control]');
        VK_LMENU       :    lbl.Caption := ('[Left Menu]');
        VK_RMENU       :    lbl.Caption := ('[Right Menu]');
        VK_PLAY        :    lbl.Caption := ('[Play]');
        VK_ZOOM        :    lbl.Caption := ('[Zoom]');
        VK_LBUTTON     :    lbl.Caption := ('[Left mouse button]');
        VK_RBUTTON     :    lbl.Caption := ('[Right mouse button]');
        VK_CANCEL      :    lbl.Caption := ('[Control-break processing]');
        VK_MBUTTON     :    lbl.Caption := ('[Rolout mouse button]');
        VK_TAB         :    lbl.Caption := ('[Tab]');
        VK_CLEAR       :    lbl.Caption := ('[Clear]');
        VK_PAUSE       :    lbl.Caption := ('[Pause]');
        VK_CAPITAL     :    lbl.Caption := ('[CapsLock]');
        VK_PRIOR       :    lbl.Caption := ('[Page UP]');
        VK_NEXT        :    lbl.Caption := ('[Page DOWN]');
        VK_END         :    lbl.Caption := ('[End]');
        VK_HOME        :    lbl.Caption := ('[Home]');
        VK_LEFT        :    lbl.Caption := ('[Left]');
        VK_RIGHT       :    lbl.Caption := ('[Right]');
        VK_UP          :    lbl.Caption := ('[Up]');
        VK_DOWN        :    lbl.Caption := ('[Down]');
        VK_SELECT      :    lbl.Caption := ('[Select]');
        VK_PRINT       :    lbl.Caption := ('[Print]');
        VK_EXECUTE     :    lbl.Caption := ('[Execute]');
        VK_SNAPSHOT    :    lbl.Caption := ('[Print Screen]');
        VK_INSERT      :    lbl.Caption := ('[Ins]');
        VK_HELP        :    lbl.Caption := ('[Help]');
        VK_F1          :    lbl.Caption := ('[F1]');
        VK_F2          :    lbl.Caption := ('[F2]');
        VK_F3          :    lbl.Caption := ('[F3]');
        VK_F4          :    lbl.Caption := ('[F4]');
        VK_F5          :    lbl.Caption := ('[F5]');
        VK_F6          :    lbl.Caption := ('[F6]');
        VK_F7          :    lbl.Caption := ('[F7]');
        VK_F8          :    lbl.Caption := ('[F8]');
        VK_F9          :    lbl.Caption := ('[F9]');
        VK_F10         :    lbl.Caption := ('[F10]');
        VK_F11         :    lbl.Caption := ('[F11]');
        VK_F12         :    lbl.Caption := ('[F12]');
        VK_F13         :    lbl.Caption := ('[F13]');
        VK_F14         :    lbl.Caption := ('[F14]');
        VK_F15         :    lbl.Caption := ('[F15]');
        VK_F16         :    lbl.Caption := ('[F16]');
        VK_F17         :    lbl.Caption := ('[F17]');
        VK_F18         :    lbl.Caption := ('[F18]');
        VK_F19         :    lbl.Caption := ('[F19]');
        VK_F20         :    lbl.Caption := ('[F20]');
        VK_F21         :    lbl.Caption := ('[F21]');
        VK_F22         :    lbl.Caption := ('[F22]');
        VK_F23         :    lbl.Caption := ('[F23]');
        VK_F24         :    lbl.Caption := ('[F24]');
        188            :    lbl.Caption := ',';
        192            :    lbl.Caption := '`';
        222            :    lbl.Caption := Chr(39);
        220            :    lbl.Caption := '';
        219            :    lbl.Caption := '[';
        221            :    lbl.Caption := ']';
        186            :    lbl.Caption := ';';
        191            :    lbl.Caption := '/';
        190            :    lbl.Caption := '.';
        187            :    lbl.Caption := '=';
        189            :    lbl.Caption := '-';
        65             :    lbl.Caption := 'a';
        66             :    lbl.Caption := 'b';
        67             :    lbl.Caption := 'c';
        68             :    lbl.Caption := 'd';
        69             :    lbl.Caption := 'e';
        70             :    lbl.Caption := 'f';
        71             :    lbl.Caption := 'g';
        72             :    lbl.Caption := 'h';
        73             :    lbl.Caption := 'i';
        74             :    lbl.Caption := 'j';
        75             :    lbl.Caption := 'k';
        76             :    lbl.Caption := 'l';
        77             :    lbl.Caption := 'm';
        78             :    lbl.Caption := 'n';
        79             :    lbl.Caption := 'o';
        80             :    lbl.Caption := 'p';
        81             :    lbl.Caption := 'q';
        82             :    lbl.Caption := 'r';
        83             :    lbl.Caption := 's';
        84             :    lbl.Caption := 't';
        85             :    lbl.Caption := 'u';
        86             :    lbl.Caption := 'v';
        87             :    lbl.Caption := 'w';
        88             :    lbl.Caption := 'x';
        89             :    lbl.Caption := 'y';
        90             :    lbl.Caption := 'z';
        VK_NUMPAD0     :    lbl.Caption := '0';
        VK_NUMPAD1     :    lbl.Caption := '1';
        VK_NUMPAD2     :    lbl.Caption := '2';
        VK_NUMPAD3     :    lbl.Caption := '3';
        VK_NUMPAD4     :    lbl.Caption := '4';
        VK_NUMPAD5     :    lbl.Caption := '5';
        VK_NUMPAD6     :    lbl.Caption := '6';
        VK_NUMPAD7     :    lbl.Caption := '7';
        VK_NUMPAD8     :    lbl.Caption := '8';
        VK_NUMPAD9     :    lbl.Caption := '9';
        48             :    lbl.Caption := 'é';
        49             :    lbl.Caption := '+';
        50             :    lbl.Caption := 'ě';
        51             :    lbl.Caption := 'š';
        52             :    lbl.Caption := 'č';
        53             :    lbl.Caption := 'ř';
        54             :    lbl.Caption := 'ž';
        55             :    lbl.Caption := 'ý';
        56             :    lbl.Caption := 'á';
        57             :    lbl.Caption := 'í';
      end;

    if GetCapsLockStatus > 0 then
    begin
     lbl.Caption := AnsiUpperCase(lbl.Caption);
    end else
    begin
     lbl.Caption := AnsiLowerCase(lbl.Caption);
    end;
  end;
  end;

begin
  Result := 0;
  Buffer := PEventMsg(lParam)^;

  if Buffer.Message = WM_KEYDOWN then
  begin
    TranslateKey(Buffer.paramL);
  end;
end;

procedure TMainForm.FormCreate(Sender: TObject);
begin
  MainHook := SetWindowsHookEx(WH_JOURNALRECORD, KeyboardHook, hInstance, 0);
  MainForm.Icon := Application.Icon;
end;

procedure TMainForm.FormDestroy(Sender: TObject);
begin
  UnhookWindowsHookEx(MainHook);
end;